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Introduction
Purpose of this manual: To provide detailedinstallation and operation instructions; to giveinsights into how the machine works; to listpossible causes for problems; and to suggestprocedures for specific types of service.
The FDE474 is an ice maker and dispensercombined into one cabinet. The refrigerationsystem is air cooled, using R-134a as a refrigerant.The control system uses electric eyes as a bincontrol and a water level sensor as the watersafety control. As ice is made, it fills a plasticstorage bin. When ice is needed, a motor rotates astainless steel vane inside the storage bin andsweeps the ice into the spout.
FDE474
March 2000Page 1
Table of ContentsSpecifications: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 2
To The Installer: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 3
For The Electrician · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 4
For The Plumber · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 5
Optional Kits: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 6
Wall Mount Kit (KWB1): · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 7
Final Check List & Initial Start Up · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 8
User Operation · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 9
Component Location & Function · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 10
Component Description: Control Box · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 11
Electrical Sequence · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 12
Refrigeration System Operation · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 13
Water System Operation: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 14
Mechanical Operation · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 15
Maintenance: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 16
Auger and Bearing Inspection · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 17
Inspection: Auger · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 18
Inspection: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 19
Service Diagnosis · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 20
Service Diagnosis · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 21
Electrical System · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 22
Removal and Replacement · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 23
Water System · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 24
Bearings, Water Seal and Auger · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 25
Bearing Replacement: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 26
Refrigeration System · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 27
Gear Reducer Removal · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 28
Auger Drive Motor · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 29
Specifications:Scotsman ice machines, like the FDE474, aredesigned to be installed indoors, in a controlledenvironment.
The minimum and maximum operating conditionsare:
�Minimum Air Temperature: 50oF.
�Maximum Air Temperature: 100oF.
�Minimum Water Temperature: 40oF.
�Maximum Water Temperature: 100oF.
�60 Hz voltage may vary between 104 and 126volts.
�Water Pressure may vary between 20 and 80psi.
Operating the machine outside these conditionsconstitutes misuse and voids the warranty.
Scotsman Ice Systems are designed andmanufactured with the highest regard for safetyand performance. They meet or exceed thestandards of UL, NSF and CUL
Scotsman assumes no liability or responsibility ofany kind for products manufactured by Scotsmanthat have been altered in any way, including theuse of parts and/of other components notspecifically approved by Scotsman.
Scotsman reserves the right to make designchanges and/or improvements at any time.Specifications and designs are subject to changewithout notice.
FDE474
March 2000Page 2
Model Number DimensionsW" x D" x H"
BasicElectrical
BinCapacity
Ice MakingCapacity
RefrigerantCharge(R134a)
Min.CircuitAmpacity
Max FuseSize
FDE474AS-1A 14 x 2334 x 277
8 115/60/1 12 lb. 470 lb./24Hr 14 oz. 14.6 20
FDE474AS-6A 14 x 2334 x 277
8 230/50/1 12 lb. 14 oz. n/a n/a
To The Installer:A professional installation of any product is criticalto the long term satisfaction of the user. TheFDE474 is designed to be installed either on acounter, or, using a wall hanging kit, hung from awall. Another option is a kit to increase the cabinetheight which will allow taller containers to beplaced under the spout. Determine the locationfrom the anticipated use and any options plannedfor.
This machine is air cooled and blows air out thelower left side of the cabinet. Do not install themachine where the side to side air flow might beblocked.
The machine will require electrical power, waterand a drain. Follow all local codes. Rough in theutilities before placing the machine into position(see For The Electrician and For The Plumber).
Water Quality:
The quality of the water supplied to the machinewill directly affect the purity of the ice and thereliability of the machine. While the condition of thewater supplied to a building is normally out of thecontrol of the user, water can be treated at thepoint of use.
There are two major types of water impurities:suspended solids (those that are carried along withthe water and may be filtered out) and dissolvedsolids (those that are part of the water and have tobe treated). A water filter is always a good idea,but does require regular maintenance to changethe cartridge. In some water conditions, watertreatment may be required. Generally this means apolyphosphate feeder of some kind. Watersofteners are not recommended for the FDE474.
General Installation:
Place the machine in its final location. Remove thetop, right and left side panels:
1. Remove two screws at the back of the top panel.
2. Pull up on the back of the top panel and removeit.
3. Remove screws from the sides (top and bottom)of the side panels and from the splash panel.
4. Pull the side panels back and off the machine.
Plumbing connections may be made thru holes inthe back of the cabinet or thru the base.
�Route the sink drain to the back of the cabinet.Route the bin drain to the back panel.
�Route the electrical power cord from thejunction box inside the cabinet. thru the backpanel .
�Route the inlet water line thru the back panel orbase to the flare fitting inside the cabinet.
Install the stainless steel panel kit (if used) now.
Install the back panel of the stainless steel panelkit now (if used).
After all plumbing and internal wiring has beendone, replace the side and back panels.
Level the unit front to back and left to right.
The machine does not require sealing to thecounter due to the gasket on the base.
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March 2000Page 3
Cooling Air Flow
Warm AirExhaust
For The ElectricianElectrical connections:
Check the nameplate for voltage and currentrequirements. An electrical cord is not supplied.Connect the FDE474 to a separate electricalcircuit. Wiring to the machine must conform to allcodes. A licensed electrician may be required insome situations.
Remove the back panel to make the electricalconnection. The electrical connection is made onthe terminal strip in the junction box inside themachine. Replace the back panel when theelectrical connections are complete.
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March 2000Page 4
FOLLOW ALL APPLICABLE LOCAL, STATEAND NATIONAL CODES
This Unit MUST BE GROUNDED
ElectricalPower
Remove Back Panel ToExpose Junction Box
For The PlumberDrains:
The dispenser requires a gravity drain. The pitchon the drain tubes must be at least 1/4 inch fall perfoot of horizontal run. On long horizontal runs, avent at the back of the cabinet will improvedraining, and is recommended.
There are two drains to connect: A sink drain, a 78“
plastic tube; and the bin drain, a 58” plastic tube.
Install rigid tubing between the machine and thebuilding drain. Route the drains separately to thebuilding drain.
Water supply:
Connect cold, potable water to the machine. Ahand valve near the location is recommended. Awater filter is also a good idea.
Follow all local codes.
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March 2000Page 5
FOLLOW ALL APPLICABLE LOCAL, STATEAND NATIONAL CODES
Strainer orFilter
Water Inlet Fitting
(Inside Cabinet)
Sink DrainBin and ReservoirOverflow Drains
Water Supply
Building Drain
(Typical)
Optional Kits:Sink Extension (KDE1 enamel or KDE1SSstainless steel):
1. Remove the standard sink and splash panelfrom the cabinet.
2. Remove the glass filler lever and holder.
3. Remove drain tube from standard sink.
4. Install drain tube onto replacement sink.
5. Remove rubber gasket from the base of thedispenser.
6. Mount the dispenser on the base. The flange ofthe dispenser base fits in slots provided in the baseextension. Secure the base extension to the sinkwith the 3 screws on the front side panel.
7. Mount the sink in place and secure with twomachine screws.
8. Install splash plate to cabinet with four machinescrews. The splash plate fits over the sink.
9. Install the glass filler lever and holder to thesplash panel.
10. Install grill.
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March 2000Page 6
Kit SplashPanel
Grill
Sink
Base Extension
Kit Components
Wall Mount Kit (KWB1):Contents:
1. Top Case Hanger Bracket: Attaches to the frameof the dispenser.
2. Top Wall Bracket: Mounts to the wall andengages the top case hanger bracket to supportthe dispenser.
3. Bottom Wall Bracket: Mounts to the wall andspaces the base of the dispenser away from thewall.
4. Bottom Fittings Cover: Fastened to the bottomwall bracket to hide the utility connections.
Installation: Check building wall for the strengthrequired to support a machine of the FDE474’sweight and size. Note that if at least 6" of space isnot left above the machine, cleaning and mostservice of the machine will require removal of themachine from the wall mounts. All utilities are to berouted thru the base. The back panel is not usedwhen the machine is hung from the wall.
Top Case Hanger Bracket
1. Remove top panel.
2. Remove back cover and save the 4 screws formounting the bracket.
3. Drill out the holes (as marked in the illustration)in the back of the frame with a 3/16" drill bit.
4. Place top hanger bracket on the inside of theframe and fasten to the frame with the fourscrews removed in step 2.
Top Wall Bracket:
1. Hold the bracket on the wall where it will bemounted.
2. Mark on the wall the positions of the holes in thebracket.
3. If needed, drill pilot holes for the fasteners.
4. Secure the bracket to the wall with fasteners ofsufficient strength to hold up the FDE474.
Bottom Wall Bracket:
1. Lift up and hang the dispenser from the top wallbracket.
2. Position the bottom wall bracket so that themolding on the dispenser base bottoms in thechannel of the wall bracket.
3. Secure the bracket to the wall.
Bottom Fitting Cover:
1. Connect electrical power, water inlet, bin drainand sink drain of the dispenser thru the bottom ofthe case.
2. Secure bottom fitting cover to the bottom wallbracket with the four sheet metal screws providedin this kit.
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March 2000Page 7
WallBrackets
Secure WithScrews
BottomCover
Enlarge Holes
Top CaseBracket
Top Panel
Final Check List & Initial Start Up1. Is the machine located indoors where thetemperature limitations are not exceeded?
2. Is there at least 6" clearance on both sides ofthe cabinet for adequate air flow?
3. Is the water supply adequate, and has a shut offvalve been installed?
4. Is the cabinet level?
5. Have all of the electrical and drain connectionsbeen made?
Initial Start Up
1. Remove 2 screws at the back of the top paneland remove the top panel.
2. Remove screws and the side panels.
3. Open the water supply shut off valve.
4. Watch the water fill the reservoir. Check that itflows in and fills the reservoir near to the markmolded into the side of the reservoir. Check thatthe float shuts off the water flow when the tank isfull. Check for leaks. Tighten hose clamps asneeded.
5. Plug the unit in or switch on the electrical power.After a few seconds the machine will start.
6. Let the machine operate, listen for any unusualnoises. If needed, reposition tubing & panels toeliminate vibration.
After the unit has been operating for about 10minutes, there should be enough ice in the bin totest the dispense system.
7. Using a container, push the glass filler lever inand see that ice is dispensed (the bin drive motorcontinues to run as long as the glass filler lever ispushed in).
8. Move the water switch (rocker switch on thefront panel) to ON. Then use a container to push inthe glass filler lever. Both water and ice should bedispensed.
9. Pour water into the sink and check that the draindoes not leak but drains the water rapidly.
10. Explain to the user the maintenancerequirements and operation of the machine.
11. Fill out the Warranty Registration and CustomerEvaluation form. Mail it to Scotsman.
12. Leave the service manual with the owner/userand explain who should be called if service isneeded.
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March 2000Page 8
User OperationThe FDE474 is an automatic ice vending machine.All it requires is cool air, clean water and anadequate supply of electrical power.
To Vend Ice:
Push the glass filler lever in and hold it in until thecontainer is full of ice. Do NOT overfill thecontainer or a build up of ice in the sink or a backup of ice in the spout will occur.
To Vend Ice and Water.
Switch the Water Switch to ON. Push in the glassfiller lever; water and ice will be dispensed into thecontainer below the spout. Note: The water is NOTcooled, it is the same temperature as the buildingsupply water.
Daily Maintenance: Pour hot water into the sink toflush out any debris or build up. Wipe the cabinetoff, wash the sink and grill to keep minerals fromaccumulating.
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March 2000Page 9
WaterSwitch
GlassFillerLever
Component Location & FunctionEvaporator. This is a vertical cylinder full of waterand refrigerated. Also in the cylinder is a slowlyrotating auger. The auger forces the ice up theevaporator walls and compresses it at the top. Theresulting flaked ice then falls by gravity into the icestorage bin.
Water Reservoir. The water reservoir contains theinlet float valve and the water level sensor. Thefloat valve controls the flow of water into thereservoir, and the water level sensor will stop theice maker if the water supply fails.
Ice Storage Bin. The ice storage bin is aninsulated plastic container that is open at the topand has a spout at the bottom. There is a rotatingice vane inside the bin that causes the ice to beswept over the spout and dispensed. The vane isrotated by a gear motor at the top of the bin.
Bin Cover. The bin cover not only keeps dirt fromthe ice storage bin, it also is the support for thedispense gear reducer and the location of theelectric eye bin controls.
Condenser. The FDE474 usesan air cooled condenser. It blowsair out, away from the fan motor.The heat removed from the wateris exhausted from the condenser.
Compressor. The refrigerationsystem compressor provides theforce to move the refrigerantaround the system.
Auger Drive. The auger drive isa direct drive gear reducer.
Glass Filler Lever. Whenpushed in, it moves a microswitchwhich causes the dispense gearreducer to rotate the vane anddispense the ice.
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March 2000Page 10
Water Reservoir
Bin Cover
Ice StorageBin
Glass Filler Lever
Condenser
Compressor
Auger DriveEvaporator
Component Description: Control BoxCircuit Board: Controlling the ice machinethrough sensors and relays. The sensors are forice level and water level. The relays are for thegear motor (with a built in time delay to clear theevaporator of ice when the unit turns off) and forthe compressor.
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March 2000Page 11
Service Light
Water OK Light
Bin FullLight
Freeze Light
CompressorRelay
AugerRelay
Control Board
LED1
LED3
Power OK Light
Electrical SequenceThere are 7 indicator lights on the control board:
�WTR-OK. Water OK. Normal = Glowing. Glowswhen there is water in the reservoir.
�PWR-OK. Power OK. Normal = Glowing. Glowswhen the control board has power and isfunctional.
�Service. Normally Off.
�Freeze. Normally Glowing when making ice.
�Bin Full. Normally Off when making ice.
�LED1. Normally Glowing when making ice.
�LED3. Normally Glowing when making ice.Connecting power to the machine does thefollowing:
�The PWR-OK light glows.
�If there is water in the reservoir the WTR-OKlight glows.
�After 10 seconds the Freeze, LED1 and LED3lights glow and the machine starts up.
Start Up:
�The compressor relay and auger motor relaybecome energized, connecting power to thewindings of the auger motor and contactor coil.
�The contactor is energized, connecting power tothe compressor, and the compressor starts.
�During normal operation ice passes betweenthe ice level sensors but only interrupts theirinfrared beam momentarily. The bin full lightremains off and the machine stays on until icebuilds up in the bin and blocks the path betweenthe sensors for 6 seconds or longer. When thatoccurs the bin full light glows and the machineshuts down.
Ice Vending
When the glass filler lever is pushed in the vendswitch closes, connecting power to the vend drivemotor.
Shut Down:
�The board’s compressor relay opens, LED1goes out.
�The external compressor relay opens
�The compressor stops
�The auger motor stays on for 1 more minute,clearing out ice in the evaporator, and then
�The auger motor relay opens, LED3 goes outand the auger motor stops.
The compressor will not restart until 2 minutes ormore have passed after the last shut down.
If the path between the ice level sensors remainsclear for more than 10 seconds the ice machinewill restart.
Another purpose of the control board is to turn themachine off when necessary:
�When the water level in the reservoir falls belowthe water level sensor’s tip, the WTR-OK lightgoes out and the machine shuts down. Whenwater refills the reservoir the WTR-OK lightglows and the machine starts up again.
�If the auger drive motor current becomesexcessive the compressor and auger drivemotor will be switched Off and the Service lightwill blink. The control board will restart the augerdrive motor in 4 minutes. If during the first 60seconds after restart the auger motor currentstays within limits, the compressor is restartedand the machine returns to normal operation. Ifthe current is excessive within 60 seconds afterthe restart, the process will be repeated oncemore. If after that try the current is stillexcessive the machine shuts down and must bemanually reset. The service light will then beglowing continuously.
To Reset: Disconnect and reconnect electricalpower
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March 2000Page 12
Refrigeration System OperationThe FDE474 uses a forced draft condenser,capillary tube and hermetic compressor. Thesystem uses R-134a as a refrigerant. Highpressure, high temperature refrigerant is forcedthru the condenser where it discharges enoughheat to condense. The high pressure liquidrefrigerant then passes thru the capillary tubewhich causes a pressure drop in the evaporator.As the high pressure liquid refrigerant moves intothe evaporator’s area of low pressure, the warmwater and low pressure cause the refrigerant toevaporate and absorb heat from the metal walls ofthe evaporator. After the refrigerant has flowed thruthe evaporator it goes back to the compressor thruthe suction line as a low pressure vapor. At thecompressor the cycle is repeated.
The FDE474 uses a low side pressure control as asafety, it will shut the system down if the suctionpressure is too low for reliable operation.
System Characteristics:
�Typical Low Side Pressure:13 - 14 PSIG
�Typical Discharge Side Pressure:135 - 175 PSIG
�System Refrigerant Charge:14 ounces of R-134a
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March 2000Page 13
Capillary Tube
Dryer
Air CooledCondenser
Compressor
Evaporator
Refrigeration System Schematic
Water System Operation:The water system consists of a float valve,reservoir and water dispense solenoid valve. Thewater level in the reservoir tank is the same levelas that inside the evaporator. Building water supplyflows to both the float valve and the solenoid. Thefloat valve will open to add water to the reservoiras water flows out to the evaporator. The solenoidwill only open if the water switch is closed and thedispense lever is pushed.
Inside the evaporator there is a water seal. Thisseal is the type that has a rotating half and astationary half. The area where the two seals touchare smooth flat surfaces. When the auger isinstalled in the evaporator, it forces the rotating halfof the seal against the stationary half. Thestationary half is spring-loaded and provides a firmpressure against the auger portion of the seal.
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March 2000Page 14
Evaporator Float Valve
Bin andReservoirOverflow
Drain
Sink Drain
Water InletConnection
Sink
Water DispensingSolenoid Valve
Water and IceDispensing Spout
Water Seal
Water System Schematic
Electric Eyes
IceDispensing
Vane
Inner BinBottom
Water LevelSensor
Mechanical OperationGeneral:
The FDE474 makes, stores and dispenses ice. Italso dispenses water. The ice making portion ofthe machine produces flaked ice at about 32
oF.
The ice falls thru a chute into the dispensing bin.Above the cylindrical bin is a dispense drive motorand electric eyes. The drive motor is connected toan ice vane in the bin. When the user pushes inthe glass filler lever, the dispense drive motorrotates the vane and the ice. There is a slot in thebase of the bin, located just above the vend spoutand glass filler lever. When the ice moves over thatslot, some of the ice on the bottom of the bin fallsthru the slot, into the chute and fills the container.
ON/OFF Control:
Flaked ice is produced by the ice maker until icebuilds up between the electric eyes. When theelectric eyes can no longer “see” each other, theysend a signal to the control board to shut themachine off. The refrigeration compressor stopsbut the auger drive motor will continue to operatefor about 2 minutes to clear the evaporator of ice.
Water Control:
Because water is such an important requirementfor making ice, a water level sensor has beenplaced in the reservoir. If the water supply to themachine should fail, the water level sensor willsend a signal to the control board to shut down themachine.
Refrigeration:
The refrigeration system uses a hermeticcompressor (specifically designed for R-134a),forced draft air cooled condenser, capillary tubeand vertical flaked ice evaporator. Inside theevaporator is a slowly rotating auger. The auger issupported by bearings at each end, and there is aface-type water seal above the bottom bearing.The auger is driven by a 1/10 HP direct drive gearreducer. The auger drive motor has a speedoperated switch on it that will keep the compressorfrom operating if the auger motor is not turning atfull speed.
Water System
Water flows from the building supply to thereservoir and to the electric solenoid valve. Waterfrom the reservoir is used to make ice. Water theflows thru the solenoid is dispensed.
The bin, sink and reservoir overflow all havedrains.
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March 2000Page 15
Maintenance:Although the ice in this dispenser is completelyuntouched, the water and ice vending systems willneed to be periodically sanitized andde-mineralized. The air cooled condenser will alsoneed to be kept clean.
Schedule the sanitation, cleaning andde-mineralization on a regular basis to keep the iceclean and the machine operating efficiently.
Sanitation and CleaningWater System:
This ice machine requires periodic sanitation andde-mineralization.
1. Vend all ice from the machine.
2. Remove top and right side panels.
3. Unplug or disconnect electrical power.
4. Shut off water supply.
5. Drain reservoir.
6. Mix 8 ounces of Scotsman Ice Machine Cleanerand 3 quarts of hot (95
oF. -115
oF.) potable water.
7. Pour the water into the reservoir.
8. Wait 15 minutes for the cleaner to dissolve theminerals inside the evaporator.
9. Plug in the machine or reconnect electricalpower.
10. As the machine operates, pour in the balanceof the cleaning solution.
11. Reconnect water supply, operate the machinefor 15 more minutes, then switch it off.
12. Repeat steps 3-11, except substitute a locallyapproved sanitizing solution for the cleaner. Apossible sanitizing solution may be obtained bymixing 1 ounce of household bleach with 2 gallonsof clean, warm (95
oF.-115
oF.) water.
13. Unplug or disconnect electrical power.
14. Remove bin top, pour in warm potable water tomelt out any ice.
15. Pull out the vane and bin bottom from the bin.
16. Thoroughly wash the bin’s interior, bin topinterior, spout, ice vane and bin bottom with thesanitizing solution. Pour some down the bin drain.
17. Reassemble the bin bottom, vane and bincover.
18. Wash the sink area with the sanitizing solutionand pour sanitizing solution down the sink drain.
19. Replace all panels and reconnect water andelectrical power.
Air Cooled Condenser:
1. Disconnect electrical power.
2. Remove top panel
3. Remove right and left side panels.
4. Use pressurized air to blow the lint from theoutside of the condenser in towards the fan motor.A vacuum cleaner hose placed on near the fanmotor should pick up most of the dust. Check forinterior dirt. If needed, use coil cleaner tode-grease the condenser.
5. Replace all panels and reconnect electricalpower.
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March 2000Page 16
Scotsman Ice MachineCleaner contains acids.These compounds maycause burns.
If swallowed, DO NOTinduce vomiting. Givelarge amounts of water ormilk. Call Physicianimmediately. In case ofexternal contact, flushwith water.
KEEP OUT OF THEREACH OF CHILDREN.
Auger and Bearing InspectionWhile in most areas regular in-place cleaning withScotsman Ice Machine Cleaner will be adequate tokeep the interior of the evaporator free ofexcessive mineral build up, some water conditionsmay require more intense methods. In addition, theauger bearings require physical inspection todetermine that they are not wearing. This physicalinspection is recommended twice per year for thetop bearing and once per year for the auger andboth bearings.
Whenever the auger is removed, replacement ofthe water seal is recommended.
If a bearing requires replacement, the otherbearing must also be replaced.
1. Unplug or disconnect electrical power.
2. Shut off the water supply.
3. Remove top panel.
4. Remove right side panel.
5. Drain the evaporator and reservoir.
6. Remove foam cap on top of evaporator.
7. Remove 2 permagum plugs from the side of theevaporator.
8. Remove 2 screws (screwheads were covered bythe permagum).
9. Pull up on the pull ring to remove the auger. If itis difficult to pull:
A. Remove the breaker cover by taking the snapring out.
B. Unscrew the auger bolt.
C. Use threaded rod or a slide hammer puller andscrew into the auger, slide the weight quickly upagainst the stop to remove the auger.
If the auger still will not move, bearing replacementis mandatory. See Bearing Removal andReplacement.
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March 2000Page 17
Snap Ring
Cap
Cap Screw
Washer
Top BearingSet
Breaker
Auger
WaterSeal
Coupling
Adapter Stand
Auger & Bearings
BreakerScrews
BottomBearing
Rotating parts hazard.
Disconnect ElectricalPower BeforeBeginning.
Inspection: AugerThe auger is made of stainless steel. It has apolished surface that may be either shinny or dull,but must be smooth. After removal, allow the augerto dry to inspect for scale. If mineral scale is foundon the auger’s surface, clean off the auger with icemachine cleaner and a scrubbing pad.
Remove the water seal and clean off the shoulderof the auger.
Bearings: The top bearing should spin freely withno rough spots. If it feels rough when spun byhand, replace it. There should be minimal rust ordirt. If in doubt, replace the bearing.
Note: The top bearing used in the FDE474 is a“directional” bearing. Note which way the innerrace is configured and install into the breaker. Thebreaker is also available as a replacement partwith the top bearing already installed.
The bottom bearing must be removed from theevaporator when replacing the water seal.
Remove bin cover.
To replace the water seal:
1. Remove old rotating half from the auger. Cleanthe mounting area.
2. Place a bead of food grade sealant (such asScotsman part number 19-0529-01) onto theshoulder of the auger where the rotating half of thewater seal will be installed.
3. Wash the new seal in water. While wet, slip itonto the bottom of the auger, rubber side towardthe auger. Push up until seated against thesealant. Do not allow any sealant to come intocontact with the face of the seal.
4. Wash the stationary half the water seal withwater. Slip it up into the bottom of the evaporatoruntil the bottom of the seal is inside the evaporatorabout 1/4".
5. Push the bottom bearing against the water sealuntil the bottom bearing is inside the evaporatorabout 1/16".
6. Replace the evaporator on the adapter, andre-attach the stand using the original bolts.
7. Attach the auger to the top bearing and breaker.
8. Return the auger to the evaporator and slide itdown until the splines touch thecoupling.
9. Rotate the auger until the couplingsplines align with the auger.
10. Push the auger down, and rotatethe breaker until the screw holes line upwith the pilot holes in the evaporator.
11. When the auger is completelyseated, reinstall the breaker screws.
12. Replace permagum and foam top.
13. Switch on the water supply.
14. Check bin cover for electricalgrounds and switch on the electricalpower.
15. Observe operation. The unit shouldmake minimal noise while producingice. Catch first 2 minutes of ice anddiscard it.
16. Replace the bin cover and allpanels.
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March 2000Page 18
SealantHere
Remove the three bolts holding the evaporatorto the gear motoradapter and lift theevaporator up slightly.Tap the water sealand bottom bearingout from the topdown. Check thebottom bearing thesame way as the top.
Replace the waterseal and install a newbearing set if needed.
Inner RaceWider on Top
Side
OpenSides
OuterRace
Water Seal
Rubber
SmoothSide
Inspection:
Photo-Electric EyesThe photo electric eyes used to “see” the ice buildup in the top of the bin cover must be clean to geta good “look” at the ice. If clouded by mineralscale, the eyes will cause the ice machine to shutoff and stay off.
To clean the photo-electric eyes.
1. Remove the top panel.
2. Pull both of the photo-electric eyes out of theirrubber grommets.
3. Wash both eyes with a clean cloth dipped inScotsman Ice Machine Cleaner.
4. Wash the eyes off with clean water.
5. Replace the eyes in the grommets
6. Replace the top panel
Water Level SensorThe water level sensor may not shut the icemachine off when the reservoir goes dry if there isa film of mineral scale on the probe tip.
1. Remove the top panel.
2. Remove the reservoir cover.
3. Pull the water level probe up and out of thereservoir.
4. Carefully wipe the tip of the probe with a cleancloth. Ice machine cleaner may be needed.
Note: The tip is made of glass.
5. Reinsert the water level sensor in the reservoir.
6. Replace the reservoir cover and the top panel.
CouplingUse the grease zerk on the side of the coupling toadd grease once per year.
That concludes normal maintenance. If the fanmotor has an oil plug, it may be oiled after 10 yearsof operation.
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March 2000Page 19
Clean Photo-ElectricEyes
Water Level Probe,keep the tip clean.
Service Diagnosis
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March 2000Page 20
PROBLEM POSSIBLE CAUSE PROBABLE CORRECTION
No ice is dispensed. No ice in bin due to:
�No electrical power Check/restore power
�Overuse Recheck ice needs vs. machinecapacity.
�Water supply turned off Check water filter/hand valve/floatvalve
�Bin controls dirty Check & clean bin control (electriceyes)
�Water sensor dirty Check & clean water sensor
�Control system malfunction Check control system
�Auger drive motor open Check auger drive motor
�Centrifugal switch open Check centrifugal switch
�Auger does not turn Check coupling & gear reducer
�No refrigeration Check refrigeration system
Ice in bin, but will not dispense:
Drive motor does not turn
�Vend switch does not close Check/replace vend switch
�Dispense motor open Check/replace dispense motor
�Dispense output shaft broken Check/replace output shaft
Ice in bin, motor turns vane.
Ice jammed up
�Users held cup againstdispense spout and jammedunit.
Advise owner/manager to instructusers.
�Bin bottom slot not over spout Check bin bottom position
�Ice will not slide down bin wall,bin out of round.
Check bin interior wall for roughtexture or out of round.
�Sink height too small forcontainer used
Install sink extension kit
�Wet ice in the bin from highwater level or high suctionpressure
Check water level, check suctionand discharge pressures
Service Diagnosis
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March 2000Page 21
PROBLEM POSSIBLE CAUSE PROBABLE CORRECTION
Unusual noise Mineral scale in evaporator Clean water system with icemachine cleaner.
Auger coupling dry Grease coupling
Auger coupling worn Replace coupling and adapterstand.
Bearings worn Replace bearings and water seal.
Gear motor loose on frame Tighten bolts, check grommets
Low water level Check water level in reservoir
Tubing vibrating Check tubing for contact
Tooth on a gear missing Check gears in auger drive
Compressor too loud Replace compressor
Gear noise Check gear motor for oil leak
No water is dispensed Water Switch in Off position Switch to ON
Water switch open Replace switch
Water solenoid plugged up Clean inlet screen of solenoid
Water solenoid coil open Replace solenoid
Vend switch open Replace switch
Water turned off Restore water supply
Water drips from spout Melting ice in chute Some water dripping is normal
Water solenoid leaks thru Replace solenoid
Ice jammed in spout Clear ice jam, check for cause
Bin drain restricted Clean drain, check bin drainage
Ice will not stop dispensing Vend switch stuck closed Replace switch
Water leaks from cabinet Evaporator water seal worn orcracked
Replace seal and bearings
Tubing to evaporator leaks Replace tubing/fittings
Drain leaks Check drain tubes and fittings
External drain restricted Clean out drain
No refrigeration Gear motor does not turn Check motor
Centrifugal switch does not close Check switch
Fan motor does not turn Check fan motor
Lack of refrigerant Add refrigerant, if problem isreduced, locate leak and repair it.
Compressor does not pump Check/replace start capacitor
Check/replace start relay
Check/replace compressor
Electrical SystemCONTROL SYSTEM DIAGNOSTICS
The control system consists of:
�Control Board
�Water Sensor
�Ice SensorsIf the unit is OFF, check the control board:
1. Is the Power OK light on? If not check power tothe unit. If it has power, and the Power OK light isNOT on, check the high pressure and low pressurecut outs. If they are both closed, replace the board.If the Power OK light is ON, go to the next step.
2. Is the Water OK light on? If it is, go to the nextstep. If not, check the water level in the reservoir. Ifthere is water in the reservoir, check that the watersensor is plugged in. To check the water sensor:
A. Unplug water sensor.
B. Pull water sensor from reservoir.
C. Place one ohmmeter lead on the sensor's plugand the other on the sensor's tip. The meter shouldshow nearly zero resistance. If it reads infiniteresistance, check the tip for corrosion. If it is cleanand still reads open, replace the sensor.
OR connect a copper wire to the wire where thewater sensor plugs into and place the other end in
the water. The water OK light should go ON. If itdoes not, replace the control board.
3. Ice sensor check. Is the Bin Full light Off? If it isOFF and the Service light is Off, and the unit is notrunning, replace the control board.
If it is OFF and the auger motor is running but thecompressor is not, check the compressor contactorcoil.
If it is on, the ice sensors may be blocked. Removethem and check for mineral scale. Scotsman's testbox can also be used to determine if the icesensors or board are defective.
Using the tester:
A. Disconnect the ice sensors at the connection bythe ice chute. Connect the LED and PHOTOTRANS wires to the control board's wires.
B. Move the Bin Full switch on the tester to Bin Full- the tester's light will blink and after a few secondsthe bin full light on the control board will come on.If not, replace the board.
Move the Bin switch on the tester to Bin Empty.The light on the tester will go out, and after a fewseconds the Bin Full light on the board will go out.If master switch is ON, the unit should start.
.
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March 2000Page 22
Removal and ReplacementPanels:
1. Remove two screws at the back of the top panel.
2. Lift up at the back and push the top panelforward to release it.
3. Remove 3 screws at the top, 3 screws at thebottom and 1 screw at the front edge of each sidepanel.
4. Push each side panel to the rear to release thepanel from the cabinet frame.
Dispensing System
The dispensing system consists of the vend switch,dispense motor, dispense vane, bin bottom andbin.
Vend Switch
1. Disconnect electrical power
2. Remove top panel
3. Remove right side panel.
4. Mark position of switch retaining screws in theslots of the switch bracket.
5. Remove two screws holding vend switch tomounting bracket.
6. Disconnect wires from vend switch
7. Remove switch from the machine.
8. Reverse to reassemble and install in the sameposition as the original.
Dispense Gear Motor
1. Disconnect electrical power.
2. Remove top panel.
3. Remove one screw holding ground strap tocabinet frame.
4. Cut off two dispense motor wire nuts.
5. Remove screws holding dispense drive gearmotor to the bin top.
6. Pull gear motor off the bin top.
7. Unscrew the output shaft extension from thegear motor.
8. Remove screws holding the mounting bracket tothe gear motor.
9. Reverse to reassemble, be certain that the newwire nuts are secure and that the ground strap isreattached.
Dispense Vane
1. Disconnect electrical power.
2. Remove top panel.
3. Remove four thumb screws holding bin cover tobin.
4. Lift bin cover off bin. Set aside.
5. Grasp the ice vane and pull it straight up.
6. Reverse to reassemble.
Bin Bottom.
Perform steps 1-5 above (to remove the dispensevane).
1. Lift bin bottom out of the dispense bin.
2. When replacing, be sure that the slot on the binbottom is over the dispense chute (at the front).
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March 2000Page 23
Dispense DriveMotor
Bin Top
Electrical Shock Hazard
Disconnect electricalpower before beginning.
Water SystemThe water system consists of the reservoir andinlet water valve.
Reservoir.
1. Shut off the water supply.
2. Remove the top panel.
3. Remove the right side panel.
4. Drain the water reservoir and evaporator.
5. Disconnect inlet and outlet tubes from thereservoir.
6. Remove screws holding reservoir to its mountingbracket.
7. Remove reservoir from the machine.
8. Reverse to reassemble.
Float Valve
1. Shut off the water supply.
2. Remove the top panel.
3. Remove the reservoir cover.
4. Remove the water inlet tube.
5. Push in the mounting tabs at the back of thereservoir and lift the valve out of the reservoir tank.
6. Replace with a new valve or replace the valveplunger.
Valve Plunger
1. After the valve has been removed from thereservoir, remove the nut holding the valve to itsmounting bracket.
2. Pull out the cotter pin to release the internalvalve plunger.
Note: Do not replace the plunger if the valve’s seatis damaged. Replace the valve.
Inlet Water Valve.
1. Disconnect electrical power.
2. Shut off the water supply.
3. Remove the top panel.
4. Remove the right side panel.
5. Remove wire harness from inlet water valve.
6. Remove tube connecting outlet of the valve tothe dispense tube.
7. Rotate the valve to unscrew it from its inletfitting.
8. Reverse to reassemble.
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March 2000Page 24
Plunger
Valve
Water LevelSensor Slot
Bearings, Water Seal and Auger1. Disconnect electrical power.
2. Shut off the water supply.
3. Remove the top panel.
4. Remove the side panels.
5. Drain the reservoir and evaporator.
6. Remove foam cap from the top of theevaporator.
7. Remove the two permagum plugs from the sideof the evaporator.
8. Pull up on the ring to lift the auger out of theevaporator.
If the auger will not lift out:
1. Remove snap ring holding bearing cover tobreaker.
2. Remove bearing cover.
3. Unscrew bolt holding bearing to auger.
4. Thread in a threaded rod and weight orslide-hammer puller into the auger.
5. Use the threaded rod & weight or slide hammerpuller to remove the auger.
Or
1. Remove three cap screws holding evaporator tothe adapter stand.
2. Lift evaporator up slightly and tip the bottom outto expose the splined end of the auger.
3. Use a plastic mallet or dead-blow hammer to tapthe bottom of the auger and force the auger up. DoNOT damage the splines of the auger or the augerwill have to be replaced.
If the auger is “frozen” to the bottom bearing, donot force the bottom bearing thru the evaporator.
1. Remove three cap screws holding evaporator tothe adapter stand.
2. Lift evaporator up slightly and tip the bottom outto expose the splined end of the auger.
3. Remove snap ring holding bearing cover tobreaker.
4. Remove bearing cover.
5. Unscrew bolt holding bearing to auger.
6. Screw a length of threaded rod or a shoulderscrew into the auger.
7. Tap on the end of the threaded rod to push theauger out of the bottom of the evaporator.
8. Replace the bearings and water seal. Replacethe auger if the splines are damaged. Replace theevaporator if more than 1/3 of the vertical riflegrooves are gone. Sand or hone and sand theinside of the evaporator if mineral build up isheavy.
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March 2000Page 25
Snap Ring
Cap
Bolt
Washer
Top Bearing
Breaker
Auger
Water Seal
Coupling
Rotating parts hazard.
Disconnect ElectricalPower Before
Bearing Replacement:Top Bearing Replacement
If the inner race is secure, use an arbor press topush the top bearing out of the breaker. If the innerrace has separated from the bearing, replace thebreaker.
Insert a new bearing in the breaker, check fororientation:
The top of the bearing has a wider inner race and anarrower outer race than the bottom.
Replace the “O” ring in the breaker.
Push the bearing in, push only on the outer race.
Water Seal & Bottom Bearing Replacement:
1. Remove old rotating half from the auger. Cleanthe mounting area.
2. Place a bead of food grade sealant (such asScotsman part number 19-0529-01) onto theshoulder of the auger where the rotating half of thewater seal will be installed.
3. Wash the new seal in water. While wet, slip itonto the bottom of the auger, rubber side towardthe auger. Push up until seated against thesealant. Do not allow any sealant to come intocontact with the face of the seal.
4. Wash the stationary half the water seal withwater. Slip it up into the bottom of the evaporatoruntil the bottom of the seal is inside the evaporatorabout 1/4".
5. Push the bottom bearing against the water sealuntil the bottom bearing is inside the evaporator
about 1/16".
6. Replace the evaporator on the adapter,and re-attach the stand using the originalbolts.
7. Attach the auger to the top bearing andbreaker.
8. Return the auger to the evaporator andslide it down until the splines touch thecoupling.
9. Rotate the auger until the couplingsplines align with the auger.
10. Push the auger down, and rotate thebreaker until the screw holes line up withthe pilot holes in the evaporator.
11. When the auger is completely seated,reinstall the breaker screws.
12. Replace permagum and foam top.
13. Switch on the water supply.
14. Check bin cover for electrical groundsand switch on the electrical power.
15. Observe operation. The unit shouldmake minimal noise while producing ice.Catch first 2 minutes of ice and discard it.
16. Replace the bin cover and all panels.
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March 2000Page 26
SealantHere
Water Seal
OuterRace
Rubber
SmoothSide
OpenSides
Inner RaceWider on Top
Side
Refrigeration SystemThis ice machine uses R-134a as therefrigerant. This refrigerant has no chlorine,and therefore requires polyolester typerefrigerant oil. This oil requires specific serviceprocedures.
General Service
A HFC type liquid line drier is required. “Standard”driers may not take out enough moisture and mayaffect the oil additives.
The time that the refrigeration system is open tothe air must not exceed 15 minutes. The oil willrapidly absorb moisture from the air, and thecontact time must be kept to a minimum.
A special or very sensitive electronic leak detectorwill be needed to locate refrigerant leaks. Many areon the market that will sense R-134a.
The access valves must be in the closed positionbefore the hose caps are removed. Do not removethe hose caps before checking the position of thevalve. Use a 3/16" allen wrench to open and closethe valve.
As with any other refrigerant, do not placepressurized air or oxygen into the refrigerationsystem.
Note: The refrigeration system uses an HFC typerefrigerant and MUST use an HFC type drier.
Evacuation to 300 microns is recommended.
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March 2000Page 27
Stem Cap
Torque to 8-12 ft. lb.
Fitting Cap
Torque to 7-12 ft. lb.
Access Valve
Torque Stem to6-8 ft. lb.
Temperature Pressure Chart, Selected Points
Temperature in0F. PSIG of R-134a
-10 2.0
-6 3.7
-4 4.6
-2 5.5
0 6.5
1 7.0
2 7.5
3 8.0
4 8.6
5 9.1
10 12.0
12 13.2
14 14.4
16 15.7
18 17.1
20 18.4
25 22.1
30 26.1
31 26.9
32 27.8
33 28.6
34 29.5
35 30.4
40 35.0
45 40.0
50 45.4
75 78.7
90 104.3
110 146.4
120 171.1
130 198.7
150 262.8
Gear Reducer Removal1. Disconnect electrical power.
2. Shut off the water supply.
3. Remove the top and side panels.
4. Remove the control box cover.
5. Remove the centrifugal switch cover on the topof the auger drive motor.
6. Disconnect the electrical wires from thecentrifugal switch.
7. Drain the evaporator and reservoir.
8. Disconnect the water inlet tube from theevaporator.
9. Remove the three screws holding the evaporatorto the adapter stand.
10. Lift the evaporator up high enough for theauger to clear the adapter stand.
11. Remove the mounting bolts holding the gearreducer to the cabinet frame.
12. Trace auger drive motor wires back to thecontrol box.
13. Disconnect the drive motor wires from the relayon the circuit board.
14. Pull the wires back to the auger drive motor.
15. Pull the gear reducer out the side of the cabinetto remove it from the machine.
Note: If there is evidence of water near the outputshaft of the gear reducer, it would be a wiseprecaution to pull the auger from the evaporatorand check the bearings.
16. Rebuild or replace the gear reducer.
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March 2000Page 28
Shaft Seals- 2,back to back
RotorBearing
Motor Cover &Bearing
Fan
Stator
Rotor
Gear Case
Output Gear
Woodruff Key
E-Clip
Gear Reducer Components
Electrical Shock Hazard
Disconnect electricalpower before beginning.
Auger Drive MotorThe windings or top bearing & cover may bereplaced without removing the evaporator or gearreducer from the machine.
1. Disconnect electrical power.
2. Shut off water supply.
3. Remove top panel.
4. Remove right side panel.
5. Drain the reservoir and evaporator.
6. Disconnect the reservoir outlet tube from thebottom of the reservoir.
7. Remove screws holding reservoir mountingbracket to the cabinet.
8. Lift the reservoir up & away from the top of theauger drive motor.
9. Remove the 4 bolts holding the auger motorcover to the gear reducer case.
10. Lift the plastic switch housing off the augerdrive motor.
11. Hold the centrifugal switch and remove thescrew holding it to the rotor of the motor.
12. Lift the centrifugal switch up and off the motor.
13. Lift the motor cover up and off the motor.
14. Pull the fan up and off the rotor.
If the windings are to be replaced, remove the leftside panel and control box cover.
1. Locate the auger drive motor wires plugged intoa relay on the circuit board.
2. Disconnect the auger motor’s wires and pullthem back to the auger drive motor.
3. Lift the auger motor windings off the gearreducer.
If the rotor needs to be removed:
1. Run a screw into the top of the rotor.
2. Grasp the screw with a grip pliers.
3. Pull and/or tap on the pliers to pull the rotor &bearing out of the gear reducer.
4. Inspect the bearing and input seal. Replacethem if worn.
Note: When the rotor is re-installed, be certain thatthe bearing is fully seated in the gear case.
Gear Reducer Rebuild
1. After the gear reducer has been removed, theinternal components may be inspected and/orreplaced. Remove all bolts holding the two casehalves together.
2. Tap against the roll pins at each end of the gearcases to split them.
3. Pry the case halves apart.
4. Check the internal condition of the gear reducer.If rusty or water is present, replace the completeassembly. The oil should be black and the properoil level is 1/8" from the top of the biggest gear(with all gears installed). Check the input seal.
The gears may be replaced individually.
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March 2000Page 29
Electrical Shock Hazard
Disconnect electricalpower before beginning.
